.titlelink {
    color: white;
    text-decoration: none;
    font-size: larger;
    line-height: 50px;
    margin-right: 20px;
}

.navbar {
    background-color: #0A2536;
    height: 50px;
    padding-left: 20px;
}

.titleleft {
    float: left;
}

.titleright {
    float: right;
}

.navbar2 {
    height: 50px;
    background: linear-gradient(to right, rgb(211, 108, 108), rgb(82, 0, 0));
    padding-left: 20px;
}

.titlelink2 {
    color: black;
    text-decoration: none;
    line-height: 50px;
    margin-right: 20px;
}

.titlelink2 span {
    color: aqua;
    vertical-align: middle;
}

.base {
    width: 90vw;
    height: 70vh;
    margin: 10px auto;
    border: 1px solid grey;
}

.imgleft {
    width: auto;
    height: auto;
    float: left;
    padding-top: 50px;
    padding-left: 0px;
}

.imgleft>img {
    padding: 0 50 0 150;
}

.form {
    padding-top: 50px;

    float: left;
}

.tips {
    color: rgb(5, 132, 218);
    font-size: small;
}

.error {
    color: red;
    margin-top: -10px;
    margin-bottom: 10px;
    font-size: small;
}

.input {
    border-radius: 5px;
    height: 30px;
    width: 250px;
    margin-bottom: 10px;
    border-color: antiquewhite;
}

.login {
    background-color: rgb(77, 215, 250);
    color: white;
    height: 30px;
    width: 250px;
    border-radius: 5px;
    border-color: white;
    border-style: hidden;
}

.bottom {
    position: fixed;
    width: 100%;
    bottom: 0;
    height: 50px;
    background-color: #0A2536;
    color: white;
    text-align: center;
    line-height: 50px;
}

.base2 {
    width: 40vw;
    height: auto;
    margin: 10px auto;
    border: 1px solid grey;
}


.img1 img {
    width: 100%;
    height: auto;
}

.text1 {
    text-align: center;
}

.img2 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    /* 3 列 */
    gap: 10px;
    /* 间距 */
    height: auto;
}

.img2 img {
    width: 100%;
    /* 撑满单元格 */
    border-radius: 6px;
}

.img2 .big {
    grid-column: 1 / 3;
    /* 从第 1 列到第 3 列（横跨 2 格）*/
    grid-row: 1 / 3;
    /* 从第 1 行到第 3 行（横跨 2 格）*/
}

.img3 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    /* 2 列 */
    gap: 10px;
    /* 间距 */
    height: auto;
}

.img3 img {
    width: 100%;
    /* 撑满单元格 */
    border-radius: 6px;
}

.base3 {
    width: 70vw;
    height: auto;
    margin: 10px auto;
    border: 1px solid grey;
}

.navgt {
    text-align: center;
    margin-top: 20;
    margin-bottom: 20px;
}

.navgt a {
    margin-right: 30;
    color: gray;
    text-decoration: none;
    font-size: larger;
}

.section {
    float: left;
    width: 75%;
}

.aside {
    float: right;
    width: 22%;
}

.video {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    /* 2 列 */
    gap: 10px;
    /* 间距 */
    height: auto;
}

.video img {
    width: 100%;
    /* 撑满单元格 */
    border-radius: 6px;
}

.photo {
    text-align: center;
    margin-top: 20px;
}

.photo img {
    aspect-ratio: 1 / 1;
    /* 让高=宽，保证正方形 */
    border-radius: 50%;
    /* 立即变圆 */
    object-fit: cover;
    width: 50px;
    height: auto;
}

.up {
    float: right;
    width: 70%;
    height: 50px;
    margin-top: 20px;
}

.basep1{
    background-color: rgb(43, 39, 39);
    color: white;
    width: 70vw;
    height: auto;
    margin: 10px auto;
    border: 1px solid grey;
    padding: 20px;
}

.basep2{
    overflow: hidden;   /* 最简单的清浮动 */
    margin-top: 20px;
    background-color: rgb(43, 39, 39);
    color: white;
    width: 70vw;
    height: auto;
    margin: 10px auto;
    border: 1px solid grey;
    padding: 20px;
}

.start video{
    width: 100%;
    height: auto;
}

.three{
    height: 100px;
}

.three a{
    margin-top: 40px;
    font-size: smaller;
    color: white;
    margin-right: 30px;
}

.three span{
    margin-top: 40px;
    font-size: smaller;
    color: white;
    margin-right: 30px;
}

.select{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 2 列 */
    gap: 10px;
    /* 间距 */
    height: auto;
    overflow: hidden;   /* 最简单的清浮动 */
}

.select img{
    width: 100%;
    /* 撑满单元格 */
    border-radius: 6px;
}

.relative{
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 2 列 */
    gap: 10px;
    /* 间距 */
    height: auto;
    overflow: hidden;   /* 最简单的清浮动 */
}

.relative img{
    width: 100%;
    /* 撑满单元格 */
    border-radius: 6px;
}

.evlt{
    background-color: white;
    height: 400px;
}
